| 摘要 |
A float valve assembly for regulating water inflow to a reservoir comprises: a) a valve unit defining a flow path having an inlet adapted for connection to a water source and an outlet adapted for connection to a purification module, and a primary valve and a secondary valve mounted along the flow path, each of the primary and secondary valves being movable between open and closed positions respectively permitting and preventing water flow through the flow path to the purification module; b) a primary float arm having an inboard end connected to the primary valve for moving the primary valve between the open and closed positions; c) a primary float coupled to an outboard end of the primary float arm and responsive to the level of water within a reservoir for moving the primary float arm to displace the primary valve from the open position to the closed position when the water level rises to a first predetermined level, and for moving the primary float arm to displace the primary valve from the closed position to the open position when the water level falls below the first predetermined level; d) a secondary float arm having an inboard end connected to the secondary valve for moving the secondary valve between the open and closed positions and e) a secondary float coupled to an outboard end of the secondary float arm and responsive to the level of water within the reservoir for moving the secondary float arm to displace the secondary valve from the open position to the closed position when the water level rises to a second predetermined level higher than the first level, and for allowing movement of the secondary float arm to displace the secondary valve from the closed position to the open position when the water level falls below the predetermined level. The primary valve comprises a banjo valve having a central valve head disposed substantially concentrically within an outer annular seal ring and interconnected thereto by a radial arm, and further wherein the inboard end of the primary float arm is co-moulded within the valve and extends therefrom through the radical arm and seal ring to protrude outwardly from the valve unit to the outboard end thereof connected to the primary float.
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